-(1/5)r=15

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Solution for -(1/5)r=15 equation: 



-(1/5)r=15

We move all terms to the left:

-(1/5)r-(15)=0



Domain of the equation: 5)r!=0

r!=0/1

r!=0

r∈R



We add all the numbers together, and all the variables

-(+1/5)r-15=0

We multiply parentheses

-r^2-15=0

We add all the numbers together, and all the variables

-1r^2-15=0

a = -1; b = 0; c = -15;
Δ = b2-4ac
Δ = 02-4·(-1)·(-15)
Δ = -60
Delta is less than zero, so there is no solution for the equation

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